Our expert says:
Have you tried having a serious talk with her, about all this ? The long coma suggests she had some degree of brain damage, and this can change a person's personality and make them more impulsive and less considerate ( her mother may know if this has been a noticeable effect ) ; but also, some people unfortunately learn to use their disability to push other people to accept their bad behaviours even if they could actually behave better.
Overall it sounds as if you have been more than understanding and kind towards her, and may well be justified in dumping her. But mabe, forst, a good discussion calmly pointing out that you're not prepared to cope with further such examples of her being selfish and thoughtless. Treat her as a normal person, makiig it clear you expect the same starndards of consideration from her as from anyone.
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